Chev 350 Vortec Engine 350HO Flat Tappet Cam Long Engine 350hp

Meet the New Chevy 350 Vortec 350HO long-engine—a rugged cast-iron powerplant built around a flat tappet cam for dependable street performance. Designed for classic swaps, street rods, and daily drivers, this 350hp engine delivers a balanced blend of mid-range torque and robust horsepower for a durable upgrade.

Key specifications

• 350 hp at 5,000 rpm
• 390 ft-lbs of torque at 3,800 rpm
• Bore x Stroke: 4.00 in. x 3.48 in
• Compression ratio: 9.12:1
• Fuel: 92 Octane recommended
• Construction: Cast iron, 4-bolt main caps
• Cam lift:.435 in. intake /.460 in. exhaust
• Cam duration at.050 in.: 212° intake / 222° exhaust
• Lobe separation: 112.5°
• Valves: 1.94 in. intake / 1.50 in. exhaust
• Rocker arms: stamped steel, 1.5:1 ratio
• 1 Piece rear main seal

Why this 350HO long-engine stands out

The combination of a stout cast-iron block, 4-bolt main caps, and a flat tappet cam profile is engineered to sustain dependable power delivery across a wide rpm range. With a balanced blend of compression and cam timing, this engine delivers satisfying mid-range torque for strong acceleration while remaining practical for street use. The 92 octane recommendation helps keep fueling economical, and the one-piece rear main seal reduces potential leaks for long-term reliability.

Ideal uses

• Classic engine swaps
• Street rods
• Daily drivers seeking a rugged 350-powered upgrade

Shipping note: Please contact us prior to purchase for the freight quote.